Name of Work:- PROVISION OF EXTERNAL ELECTRICAL SUPPLY FOR INFRASTRCTURE AT 7.426 ACRES LAND AT NAVAL STATION KOCHI
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Item Description
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Supply, install, connecting up existing cables, testing and commissioning of HT 12 KV rated voltage and 11 KV operating voltage, 21 kA for 3 seconds, 3 phase 50 Hz,IP 54, SCADA compatible,motorised, two way Ring Main Unit (+CV+) comprising one number vacuum circuit breaker duly interlocked as Outgoing and one number motorised load break isolator as Incoming , battery chargers, totally enclosed metal clad switch gear with motorized 24 volt DC battery bank and charger, protection relays, having rated current of Ring Switch and Breaker is 630 Amp, both side extensible, with internal arc classification with AFLR with 21 kA for one second, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer and connecting existing cables to new RMU. The unit shall be painted in RAL7012/7035 paint shade with folowing specifications and all as per theIEC 60298,IEC 60265, IEC 60129,IEC 60420,IEC 60056,IEC 60694 and as per the specification of the manufacturer of Make : SIEMENS / ABB/SCHNEIDER.
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(a) Ring Switch/Isolator (i) Capacity 11 KV, HT, 630 Amps. Triple pole, single break, having three position ('ON', 'OFF' and 'EARTH') Ring Main Switches, each with independent motor charged spring mechanism and fully rated earth switch. (ii) Air insulated cable boxes with gland plate suitable for bottom entry of single run of three core cable up to 300 sqmm. (iii) Cable Bushings (iv) Capacitive Voltage Indicator with LED Display. (v) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Actuator Kit for motorised operation. (vii) One set of Potential Free contacts for SCADA Compatibility. (viii) Fault Passage Indicators (ix) One set of Right Angle Boots-NON TOUCH PROOF
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(b) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) multi powered Over current, Earth Fault and short circuit three element numerical Relay with digital display(iv) Resin cast current transformers for protection mounted on Cable / cable box of ratio 60-30/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Moulded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) Right Angle Boots-NON TOUCH PROOF. (ix) Make of RMU and VCB need to be same. Please Enable Macros to View BoQ information
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(b) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) multi powered Over current, Earth Fault and short circuit three element numerical Relay with digital display(iv) Resin cast current transformers for protection mounted on Cable / cable box of ratio 60-30/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Moulded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) Right Angle Boots-NON TOUCH PROOF. (ix) Make of RMU and VCB need to be same. Please Enable Macros to View BoQ information
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